Designed for severe conditions, the Atom SV Hoody is Arc’teryx’s warmest synthetic midlayer. Built with Coreloft™ insulation and wrapped in a wind-resistant shell, it delivers serious warmth without the bulk. The StormHood™ is helmet-compatible and low-profile, while articulated patterning ensures freedom of movement whether layered under a shell or worn on its own. Lightweight, packable, and built to perform—this is a winter essential that holds its own from alpine routes to city cold snaps.